[Anchorman]

Thanks - I hadn't missed those, but I'm pretty sure that what's shown are fronts. My current question relates to rears.

Partial Post: Please Login or Register to read the full post.

[Big Dave]

[quote name='flash' post='65843' date='Jan 20 2009, 04:00 PM']correct -



not sure why the car was swapping ends, i presume rotors were changed to match the calipers - i tend to think the car's balance was upset, not necessarily as a result of braking issues - was it doing it as the same speeds and weight transfers as before the change?



big reds up front and a bias valve won't balance either - many people make this mistake - it will just be front biased - it will "feel" like it's braking better, because the front will dive and you'll have that sensation of a big pull down, but in reality it won't be stopping as well - if you go big reds up front, do it in the rear too



braking systems are all about balance - there is a really good bit of info on this on the stoptech site



pete can also fill anyone in a lot on this[/quote]



Actually flash your "yet again",,,incorrect...

The rear calipers are the same across the entire 968 range regardless of M030 or not...



Like i said my good m8 has the Big Reds fitted with the 5/33 valve + it performs great...He can stop faster than my set up. but only just.... <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" />



Rears.

The extra size of the pistons from front to rear is whats making the rear brake/lock harder than normal... No sticking pistons or anything as ALL [f+r],the braking system is brand new.. Calipers were ALL FULLY o/hauled ie new pistons / seals etc etc ,,,new discs were fitted + Pagid Blues front + back...With Castrol SRF fluid + braided hoses throughout....

I just wouldnt recomend fitting the standard fronts on the rear....Unless you want to exit the road / track backwards....



I was only updating my previous Question, + passing on my experiences... I hadnt expected this sort of response .. <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" /> <img src="/forum/images/smilies/968/rolleyes.gif" class="smilie" alt="" />

Partial Post: Please Login or Register to read the full post.

[flash]

how was i incorrect? my what is incorrect? (you said "your") i never said the rear calipers were different



there could be any number of reasons he outstops you (including spring rates, shock setting, tire compound, camber angle, toe set, etc)



fitting big reds up front, and not increasing in the rear will upset brake balance, and cause too much front weight transfer for balanced braking - many people do it - yes, it mitigates front brake heat - it still isn't right - you can mask the problem but the rear brakes still won't be doing as much work as they should relative to the front - it's the wrong approach, just like adding a lot of negative camber to correct tire roll is the wrong approach, when you should actually be working on the cause of the roll - a quick check of rotor temps will show you what i am saying - properly set up, they should be nearly the same front to rear - that will provide maximum braking at all four corners - working to make that happen is the key



as i said, talk to pete

Partial Post: Please Login or Register to read the full post.

[Anchorman]

...and maybe I need to clarify my question. What are the differences, if any, between stock rear 968 calipers and M030 rear calipers? Are they the same physical size with the same piston sizes? are they the same size with different piston sizes? or are they completely the same?

Partial Post: Please Login or Register to read the full post.

[flash]

none that i can find



here:

http://www.weissach.net/968_M030-Option.html

Partial Post: Please Login or Register to read the full post.

[Anchorman]

Thanks. That certainly seems to confirm that the only differences in the rear are rotors and pads.

Partial Post: Please Login or Register to read the full post.

[flash]

yup

Partial Post: Please Login or Register to read the full post.

[BerndCF]

[quote name='Anchorman' post='65863' date='Jan 20 2009, 08:29 PM']What are the differences, if any, between stock rear 968 calipers and M030 rear calipers? Are they completely the same?[/quote]

Yes. So simple.

Partial Post: Please Login or Register to read the full post.

[Big Dave]

Flash.

As far as i was concerened you were answering anchorman post.

As you post followed on from his....

Thats why i said you were incorrect as you agreed with his coments, which were wrong....

Partial Post: Please Login or Register to read the full post.

[flash]

this is a problem with this kind of communication - what i said was in answer to a question, it was not commenting on the size of the rear - he asked if it was proper to change out the rears at the same time as doing the fronts - i said "correct"



the drilled rotors and different pad material help balance out the brakes to the larger fronts - i further went on to clarify that answer by referring to balance of the system, and including resources for more complete information



that being said, i made no error i can see

Partial Post: Please Login or Register to read the full post.

[mattipuh]

Here's my setup:
996 Gt3 mk1 front calipers + 330x34mm discs, with ferodo 2500 pads.
to rear we changed to 968 CS drilled OEM-sized discs.

have to run the pads in for starters, but it seems that braking power has increased slightly. .. [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

if you're interested, my friend Antti (runs 9xx -parts webshop; <i><b>www.9xx-parts.com</b></i>) can manufacture you the adapters to fit these calibers.
are made of aviation-aluminium (very light, but strong as steel. comes with helicoils).

This brake set increases weight to the front axle a bit (discs are almost 10lbs heavier than OEM per each, but my car is already lighter from OEM).

Partial Post: Please Login or Register to read the full post.

[mattipuh]

I discussed with Antti from 9xx-Parts, and He's open for manufacturing adapters to US market aswell, if you guys are interested.
He has ready design for non M030 front hubs, to fit 996 Turbo front calibers + discs. (you can use 330mm or 350mm disc)

You can contact me or Antti directly, if you're intersted in this kind of upgrade.

Partial Post: Please Login or Register to read the full post.